1 /* drivers/atm/eni.c - Efficient Networks ENI155P device driver */ 2 3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 4 5 6 #include <linux/module.h> 7 #include <linux/kernel.h> 8 #include <linux/mm.h> 9 #include <linux/pci.h> 10 #include <linux/errno.h> 11 #include <linux/atm.h> 12 #include <linux/atmdev.h> 13 #include <linux/sonet.h> 14 #include <linux/skbuff.h> 15 #include <linux/time.h> 16 #include <linux/delay.h> 17 #include <linux/uio.h> 18 #include <linux/init.h> 19 #include <linux/atm_eni.h> 20 #include <linux/bitops.h> 21 #include <asm/system.h> 22 #include <asm/io.h> 23 #include <asm/atomic.h> 24 #include <asm/uaccess.h> 25 #include <asm/string.h> 26 #include <asm/byteorder.h> 27 28 #include "tonga.h" 29 #include "midway.h" 30 #include "suni.h" 31 #include "eni.h" 32 33 #if !defined(__i386__) && !defined(__x86_64__) 34 #ifndef ioremap_nocache 35 #define ioremap_nocache(X,Y) ioremap(X,Y) 36 #endif 37 #endif 38 39 /* 40 * TODO: 41 * 42 * Show stoppers 43 * none 44 * 45 * Minor 46 * - OAM support 47 * - fix bugs listed below 48 */ 49 50 /* 51 * KNOWN BUGS: 52 * 53 * - may run into JK-JK bug and deadlock 54 * - should allocate UBR channel first 55 * - buffer space allocation algorithm is stupid 56 * (RX: should be maxSDU+maxdelay*rate 57 * TX: should be maxSDU+min(maxSDU,maxdelay*rate) ) 58 * - doesn't support OAM cells 59 * - eni_put_free may hang if not putting memory fragments that _complete_ 60 * 2^n block (never happens in real life, though) 61 */ 62 63 64 #if 0 65 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 66 #else 67 #define DPRINTK(format,args...) 68 #endif 69 70 71 #ifndef CONFIG_ATM_ENI_TUNE_BURST 72 #define CONFIG_ATM_ENI_BURST_TX_8W 73 #define CONFIG_ATM_ENI_BURST_RX_4W 74 #endif 75 76 77 #ifndef CONFIG_ATM_ENI_DEBUG 78 79 80 #define NULLCHECK(x) 81 82 #define EVENT(s,a,b) 83 84 85 static void event_dump(void) 86 { 87 } 88 89 90 #else 91 92 93 /* 94 * NULL pointer checking 95 */ 96 97 #define NULLCHECK(x) \ 98 if ((unsigned long) (x) < 0x30) \ 99 printk(KERN_CRIT #x "==0x%lx\n",(unsigned long) (x)) 100 101 /* 102 * Very extensive activity logging. Greatly improves bug detection speed but 103 * costs a few Mbps if enabled. 104 */ 105 106 #define EV 64 107 108 static const char *ev[EV]; 109 static unsigned long ev_a[EV],ev_b[EV]; 110 static int ec = 0; 111 112 113 static void EVENT(const char *s,unsigned long a,unsigned long b) 114 { 115 ev[ec] = s; 116 ev_a[ec] = a; 117 ev_b[ec] = b; 118 ec = (ec+1) % EV; 119 } 120 121 122 static void event_dump(void) 123 { 124 int n,i; 125 126 for (n = 0; n < EV; n++) { 127 i = (ec+n) % EV; 128 printk(KERN_NOTICE); 129 printk(ev[i] ? ev[i] : "(null)",ev_a[i],ev_b[i]); 130 } 131 } 132 133 134 #endif /* CONFIG_ATM_ENI_DEBUG */ 135 136 137 /* 138 * NExx must not be equal at end 139 * EExx may be equal at end 140 * xxPJOK verify validity of pointer jumps 141 * xxPMOK operating on a circular buffer of "c" words 142 */ 143 144 #define NEPJOK(a0,a1,b) \ 145 ((a0) < (a1) ? (b) <= (a0) || (b) > (a1) : (b) <= (a0) && (b) > (a1)) 146 #define EEPJOK(a0,a1,b) \ 147 ((a0) < (a1) ? (b) < (a0) || (b) >= (a1) : (b) < (a0) && (b) >= (a1)) 148 #define NEPMOK(a0,d,b,c) NEPJOK(a0,(a0+d) & (c-1),b) 149 #define EEPMOK(a0,d,b,c) EEPJOK(a0,(a0+d) & (c-1),b) 150 151 152 static int tx_complete = 0,dma_complete = 0,queued = 0,requeued = 0, 153 backlogged = 0,rx_enqueued = 0,rx_dequeued = 0,pushed = 0,submitted = 0, 154 putting = 0; 155 156 static struct atm_dev *eni_boards = NULL; 157 158 static u32 *cpu_zeroes = NULL; /* aligned "magic" zeroes */ 159 static dma_addr_t zeroes; 160 161 /* Read/write registers on card */ 162 #define eni_in(r) readl(eni_dev->reg+(r)*4) 163 #define eni_out(v,r) writel((v),eni_dev->reg+(r)*4) 164 165 166 /*-------------------------------- utilities --------------------------------*/ 167 168 169 static void dump_mem(struct eni_dev *eni_dev) 170 { 171 int i; 172 173 for (i = 0; i < eni_dev->free_len; i++) 174 printk(KERN_DEBUG " %d: %p %d\n",i, 175 eni_dev->free_list[i].start, 176 1 << eni_dev->free_list[i].order); 177 } 178 179 180 static void dump(struct atm_dev *dev) 181 { 182 struct eni_dev *eni_dev; 183 184 int i; 185 186 eni_dev = ENI_DEV(dev); 187 printk(KERN_NOTICE "Free memory\n"); 188 dump_mem(eni_dev); 189 printk(KERN_NOTICE "TX buffers\n"); 190 for (i = 0; i < NR_CHAN; i++) 191 if (eni_dev->tx[i].send) 192 printk(KERN_NOTICE " TX %d @ %p: %ld\n",i, 193 eni_dev->tx[i].send,eni_dev->tx[i].words*4); 194 printk(KERN_NOTICE "RX buffers\n"); 195 for (i = 0; i < 1024; i++) 196 if (eni_dev->rx_map[i] && ENI_VCC(eni_dev->rx_map[i])->rx) 197 printk(KERN_NOTICE " RX %d @ %p: %ld\n",i, 198 ENI_VCC(eni_dev->rx_map[i])->recv, 199 ENI_VCC(eni_dev->rx_map[i])->words*4); 200 printk(KERN_NOTICE "----\n"); 201 } 202 203 204 static void eni_put_free(struct eni_dev *eni_dev, void __iomem *start, 205 unsigned long size) 206 { 207 struct eni_free *list; 208 int len,order; 209 210 DPRINTK("init 0x%lx+%ld(0x%lx)\n",start,size,size); 211 start += eni_dev->base_diff; 212 list = eni_dev->free_list; 213 len = eni_dev->free_len; 214 while (size) { 215 if (len >= eni_dev->free_list_size) { 216 printk(KERN_CRIT "eni_put_free overflow (%p,%ld)\n", 217 start,size); 218 break; 219 } 220 for (order = 0; !(((unsigned long)start | size) & (1 << order)); order++); 221 if (MID_MIN_BUF_SIZE > (1 << order)) { 222 printk(KERN_CRIT "eni_put_free: order %d too small\n", 223 order); 224 break; 225 } 226 list[len].start = (void __iomem *) start; 227 list[len].order = order; 228 len++; 229 start += 1 << order; 230 size -= 1 << order; 231 } 232 eni_dev->free_len = len; 233 /*dump_mem(eni_dev);*/ 234 } 235 236 237 static void __iomem *eni_alloc_mem(struct eni_dev *eni_dev, unsigned long *size) 238 { 239 struct eni_free *list; 240 void __iomem *start; 241 int len,i,order,best_order,index; 242 243 list = eni_dev->free_list; 244 len = eni_dev->free_len; 245 if (*size < MID_MIN_BUF_SIZE) *size = MID_MIN_BUF_SIZE; 246 if (*size > MID_MAX_BUF_SIZE) return NULL; 247 for (order = 0; (1 << order) < *size; order++); 248 DPRINTK("trying: %ld->%d\n",*size,order); 249 best_order = 65; /* we don't have more than 2^64 of anything ... */ 250 index = 0; /* silence GCC */ 251 for (i = 0; i < len; i++) 252 if (list[i].order == order) { 253 best_order = order; 254 index = i; 255 break; 256 } 257 else if (best_order > list[i].order && list[i].order > order) { 258 best_order = list[i].order; 259 index = i; 260 } 261 if (best_order == 65) return NULL; 262 start = list[index].start-eni_dev->base_diff; 263 list[index] = list[--len]; 264 eni_dev->free_len = len; 265 *size = 1 << order; 266 eni_put_free(eni_dev,start+*size,(1 << best_order)-*size); 267 DPRINTK("%ld bytes (order %d) at 0x%lx\n",*size,order,start); 268 memset_io(start,0,*size); /* never leak data */ 269 /*dump_mem(eni_dev);*/ 270 return start; 271 } 272 273 274 static void eni_free_mem(struct eni_dev *eni_dev, void __iomem *start, 275 unsigned long size) 276 { 277 struct eni_free *list; 278 int len,i,order; 279 280 start += eni_dev->base_diff; 281 list = eni_dev->free_list; 282 len = eni_dev->free_len; 283 for (order = -1; size; order++) size >>= 1; 284 DPRINTK("eni_free_mem: %p+0x%lx (order %d)\n",start,size,order); 285 for (i = 0; i < len; i++) 286 if (((unsigned long) list[i].start) == ((unsigned long)start^(1 << order)) && 287 list[i].order == order) { 288 DPRINTK("match[%d]: 0x%lx/0x%lx(0x%x), %d/%d\n",i, 289 list[i].start,start,1 << order,list[i].order,order); 290 list[i] = list[--len]; 291 start = (void __iomem *) ((unsigned long) start & ~(unsigned long) (1 << order)); 292 order++; 293 i = -1; 294 continue; 295 } 296 if (len >= eni_dev->free_list_size) { 297 printk(KERN_ALERT "eni_free_mem overflow (%p,%d)\n",start, 298 order); 299 return; 300 } 301 list[len].start = start; 302 list[len].order = order; 303 eni_dev->free_len = len+1; 304 /*dump_mem(eni_dev);*/ 305 } 306 307 308 /*----------------------------------- RX ------------------------------------*/ 309 310 311 #define ENI_VCC_NOS ((struct atm_vcc *) 1) 312 313 314 static void rx_ident_err(struct atm_vcc *vcc) 315 { 316 struct atm_dev *dev; 317 struct eni_dev *eni_dev; 318 struct eni_vcc *eni_vcc; 319 320 dev = vcc->dev; 321 eni_dev = ENI_DEV(dev); 322 /* immediately halt adapter */ 323 eni_out(eni_in(MID_MC_S) & 324 ~(MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE),MID_MC_S); 325 /* dump useful information */ 326 eni_vcc = ENI_VCC(vcc); 327 printk(KERN_ALERT DEV_LABEL "(itf %d): driver error - RX ident " 328 "mismatch\n",dev->number); 329 printk(KERN_ALERT " VCI %d, rxing %d, words %ld\n",vcc->vci, 330 eni_vcc->rxing,eni_vcc->words); 331 printk(KERN_ALERT " host descr 0x%lx, rx pos 0x%lx, descr value " 332 "0x%x\n",eni_vcc->descr,eni_vcc->rx_pos, 333 (unsigned) readl(eni_vcc->recv+eni_vcc->descr*4)); 334 printk(KERN_ALERT " last %p, servicing %d\n",eni_vcc->last, 335 eni_vcc->servicing); 336 EVENT("---dump ends here---\n",0,0); 337 printk(KERN_NOTICE "---recent events---\n"); 338 event_dump(); 339 ENI_DEV(dev)->fast = NULL; /* really stop it */ 340 ENI_DEV(dev)->slow = NULL; 341 skb_queue_head_init(&ENI_DEV(dev)->rx_queue); 342 } 343 344 345 static int do_rx_dma(struct atm_vcc *vcc,struct sk_buff *skb, 346 unsigned long skip,unsigned long size,unsigned long eff) 347 { 348 struct eni_dev *eni_dev; 349 struct eni_vcc *eni_vcc; 350 u32 dma_rd,dma_wr; 351 u32 dma[RX_DMA_BUF*2]; 352 dma_addr_t paddr; 353 unsigned long here; 354 int i,j; 355 356 eni_dev = ENI_DEV(vcc->dev); 357 eni_vcc = ENI_VCC(vcc); 358 paddr = 0; /* GCC, shut up */ 359 if (skb) { 360 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 361 PCI_DMA_FROMDEVICE); 362 ENI_PRV_PADDR(skb) = paddr; 363 if (paddr & 3) 364 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %d has " 365 "mis-aligned RX data (0x%lx)\n",vcc->dev->number, 366 vcc->vci,(unsigned long) paddr); 367 ENI_PRV_SIZE(skb) = size+skip; 368 /* PDU plus descriptor */ 369 ATM_SKB(skb)->vcc = vcc; 370 } 371 j = 0; 372 if ((eff && skip) || 1) { /* @@@ actually, skip is always == 1 ... */ 373 here = (eni_vcc->descr+skip) & (eni_vcc->words-1); 374 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | (vcc->vci 375 << MID_DMA_VCI_SHIFT) | MID_DT_JK; 376 j++; 377 } 378 here = (eni_vcc->descr+size+skip) & (eni_vcc->words-1); 379 if (!eff) size += skip; 380 else { 381 unsigned long words; 382 383 if (!size) { 384 DPRINTK("strange things happen ...\n"); 385 EVENT("strange things happen ... (skip=%ld,eff=%ld)\n", 386 size,eff); 387 } 388 words = eff; 389 if (paddr & 15) { 390 unsigned long init; 391 392 init = 4-((paddr & 15) >> 2); 393 if (init > words) init = words; 394 dma[j++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 395 (vcc->vci << MID_DMA_VCI_SHIFT); 396 dma[j++] = paddr; 397 paddr += init << 2; 398 words -= init; 399 } 400 #ifdef CONFIG_ATM_ENI_BURST_RX_16W /* may work with some PCI chipsets ... */ 401 if (words & ~15) { 402 dma[j++] = MID_DT_16W | ((words >> 4) << 403 MID_DMA_COUNT_SHIFT) | (vcc->vci << 404 MID_DMA_VCI_SHIFT); 405 dma[j++] = paddr; 406 paddr += (words & ~15) << 2; 407 words &= 15; 408 } 409 #endif 410 #ifdef CONFIG_ATM_ENI_BURST_RX_8W /* works only with *some* PCI chipsets ... */ 411 if (words & ~7) { 412 dma[j++] = MID_DT_8W | ((words >> 3) << 413 MID_DMA_COUNT_SHIFT) | (vcc->vci << 414 MID_DMA_VCI_SHIFT); 415 dma[j++] = paddr; 416 paddr += (words & ~7) << 2; 417 words &= 7; 418 } 419 #endif 420 #ifdef CONFIG_ATM_ENI_BURST_RX_4W /* recommended */ 421 if (words & ~3) { 422 dma[j++] = MID_DT_4W | ((words >> 2) << 423 MID_DMA_COUNT_SHIFT) | (vcc->vci << 424 MID_DMA_VCI_SHIFT); 425 dma[j++] = paddr; 426 paddr += (words & ~3) << 2; 427 words &= 3; 428 } 429 #endif 430 #ifdef CONFIG_ATM_ENI_BURST_RX_2W /* probably useless if RX_4W, RX_8W, ... */ 431 if (words & ~1) { 432 dma[j++] = MID_DT_2W | ((words >> 1) << 433 MID_DMA_COUNT_SHIFT) | (vcc->vci << 434 MID_DMA_VCI_SHIFT); 435 dma[j++] = paddr; 436 paddr += (words & ~1) << 2; 437 words &= 1; 438 } 439 #endif 440 if (words) { 441 dma[j++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) 442 | (vcc->vci << MID_DMA_VCI_SHIFT); 443 dma[j++] = paddr; 444 } 445 } 446 if (size != eff) { 447 dma[j++] = (here << MID_DMA_COUNT_SHIFT) | 448 (vcc->vci << MID_DMA_VCI_SHIFT) | MID_DT_JK; 449 j++; 450 } 451 if (!j || j > 2*RX_DMA_BUF) { 452 printk(KERN_CRIT DEV_LABEL "!j or j too big!!!\n"); 453 goto trouble; 454 } 455 dma[j-2] |= MID_DMA_END; 456 j = j >> 1; 457 dma_wr = eni_in(MID_DMA_WR_RX); 458 dma_rd = eni_in(MID_DMA_RD_RX); 459 /* 460 * Can I move the dma_wr pointer by 2j+1 positions without overwriting 461 * data that hasn't been read (position of dma_rd) yet ? 462 */ 463 if (!NEPMOK(dma_wr,j+j+1,dma_rd,NR_DMA_RX)) { /* @@@ +1 is ugly */ 464 printk(KERN_WARNING DEV_LABEL "(itf %d): RX DMA full\n", 465 vcc->dev->number); 466 goto trouble; 467 } 468 for (i = 0; i < j; i++) { 469 writel(dma[i*2],eni_dev->rx_dma+dma_wr*8); 470 writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); 471 dma_wr = (dma_wr+1) & (NR_DMA_RX-1); 472 } 473 if (skb) { 474 ENI_PRV_POS(skb) = eni_vcc->descr+size+1; 475 skb_queue_tail(&eni_dev->rx_queue,skb); 476 eni_vcc->last = skb; 477 rx_enqueued++; 478 } 479 eni_vcc->descr = here; 480 eni_out(dma_wr,MID_DMA_WR_RX); 481 return 0; 482 483 trouble: 484 if (paddr) 485 pci_unmap_single(eni_dev->pci_dev,paddr,skb->len, 486 PCI_DMA_FROMDEVICE); 487 if (skb) dev_kfree_skb_irq(skb); 488 return -1; 489 } 490 491 492 static void discard(struct atm_vcc *vcc,unsigned long size) 493 { 494 struct eni_vcc *eni_vcc; 495 496 eni_vcc = ENI_VCC(vcc); 497 EVENT("discard (size=%ld)\n",size,0); 498 while (do_rx_dma(vcc,NULL,1,size,0)) EVENT("BUSY LOOP",0,0); 499 /* could do a full fallback, but that might be more expensive */ 500 if (eni_vcc->rxing) ENI_PRV_POS(eni_vcc->last) += size+1; 501 else eni_vcc->rx_pos = (eni_vcc->rx_pos+size+1) & (eni_vcc->words-1); 502 } 503 504 505 /* 506 * TODO: should check whether direct copies (without DMA setup, dequeuing on 507 * interrupt, etc.) aren't much faster for AAL0 508 */ 509 510 static int rx_aal0(struct atm_vcc *vcc) 511 { 512 struct eni_vcc *eni_vcc; 513 unsigned long descr; 514 unsigned long length; 515 struct sk_buff *skb; 516 517 DPRINTK(">rx_aal0\n"); 518 eni_vcc = ENI_VCC(vcc); 519 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 520 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 521 rx_ident_err(vcc); 522 return 1; 523 } 524 if (descr & MID_RED_T) { 525 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 526 vcc->dev->number); 527 length = 0; 528 atomic_inc(&vcc->stats->rx_err); 529 } 530 else { 531 length = ATM_CELL_SIZE-1; /* no HEC */ 532 } 533 skb = length ? atm_alloc_charge(vcc,length,GFP_ATOMIC) : NULL; 534 if (!skb) { 535 discard(vcc,length >> 2); 536 return 0; 537 } 538 skb_put(skb,length); 539 skb_set_timestamp(skb, &eni_vcc->timestamp); 540 DPRINTK("got len %ld\n",length); 541 if (do_rx_dma(vcc,skb,1,length >> 2,length >> 2)) return 1; 542 eni_vcc->rxing++; 543 return 0; 544 } 545 546 547 static int rx_aal5(struct atm_vcc *vcc) 548 { 549 struct eni_vcc *eni_vcc; 550 unsigned long descr; 551 unsigned long size,eff,length; 552 struct sk_buff *skb; 553 554 EVENT("rx_aal5\n",0,0); 555 DPRINTK(">rx_aal5\n"); 556 eni_vcc = ENI_VCC(vcc); 557 descr = readl(eni_vcc->recv+eni_vcc->descr*4); 558 if ((descr & MID_RED_IDEN) != (MID_RED_RX_ID << MID_RED_SHIFT)) { 559 rx_ident_err(vcc); 560 return 1; 561 } 562 if (descr & (MID_RED_T | MID_RED_CRC_ERR)) { 563 if (descr & MID_RED_T) { 564 EVENT("empty cell (descr=0x%lx)\n",descr,0); 565 DPRINTK(DEV_LABEL "(itf %d): trashing empty cell\n", 566 vcc->dev->number); 567 size = 0; 568 } 569 else { 570 static unsigned long silence = 0; 571 572 if (time_after(jiffies, silence) || silence == 0) { 573 printk(KERN_WARNING DEV_LABEL "(itf %d): " 574 "discarding PDU(s) with CRC error\n", 575 vcc->dev->number); 576 silence = (jiffies+2*HZ)|1; 577 } 578 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 579 EVENT("CRC error (descr=0x%lx,size=%ld)\n",descr, 580 size); 581 } 582 eff = length = 0; 583 atomic_inc(&vcc->stats->rx_err); 584 } 585 else { 586 size = (descr & MID_RED_COUNT)*(ATM_CELL_PAYLOAD >> 2); 587 DPRINTK("size=%ld\n",size); 588 length = readl(eni_vcc->recv+(((eni_vcc->descr+size-1) & 589 (eni_vcc->words-1)))*4) & 0xffff; 590 /* -trailer(2)+header(1) */ 591 if (length && length <= (size << 2)-8 && length <= 592 ATM_MAX_AAL5_PDU) eff = (length+3) >> 2; 593 else { /* ^ trailer length (8) */ 594 EVENT("bad PDU (descr=0x08%lx,length=%ld)\n",descr, 595 length); 596 printk(KERN_ERR DEV_LABEL "(itf %d): bad AAL5 PDU " 597 "(VCI=%d,length=%ld,size=%ld (descr 0x%lx))\n", 598 vcc->dev->number,vcc->vci,length,size << 2,descr); 599 length = eff = 0; 600 atomic_inc(&vcc->stats->rx_err); 601 } 602 } 603 skb = eff ? atm_alloc_charge(vcc,eff << 2,GFP_ATOMIC) : NULL; 604 if (!skb) { 605 discard(vcc,size); 606 return 0; 607 } 608 skb_put(skb,length); 609 DPRINTK("got len %ld\n",length); 610 if (do_rx_dma(vcc,skb,1,size,eff)) return 1; 611 eni_vcc->rxing++; 612 return 0; 613 } 614 615 616 static inline int rx_vcc(struct atm_vcc *vcc) 617 { 618 void __iomem *vci_dsc; 619 unsigned long tmp; 620 struct eni_vcc *eni_vcc; 621 622 eni_vcc = ENI_VCC(vcc); 623 vci_dsc = ENI_DEV(vcc->dev)->vci+vcc->vci*16; 624 EVENT("rx_vcc(1)\n",0,0); 625 while (eni_vcc->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) >> 626 MID_VCI_DESCR_SHIFT)) { 627 EVENT("rx_vcc(2: host dsc=0x%lx, nic dsc=0x%lx)\n", 628 eni_vcc->descr,tmp); 629 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 630 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 631 MID_VCI_DESCR_SHIFT)); 632 if (ENI_VCC(vcc)->rx(vcc)) return 1; 633 } 634 /* clear IN_SERVICE flag */ 635 writel(readl(vci_dsc) & ~MID_VCI_IN_SERVICE,vci_dsc); 636 /* 637 * If new data has arrived between evaluating the while condition and 638 * clearing IN_SERVICE, we wouldn't be notified until additional data 639 * follows. So we have to loop again to be sure. 640 */ 641 EVENT("rx_vcc(3)\n",0,0); 642 while (ENI_VCC(vcc)->descr != (tmp = (readl(vci_dsc+4) & MID_VCI_DESCR) 643 >> MID_VCI_DESCR_SHIFT)) { 644 EVENT("rx_vcc(4: host dsc=0x%lx, nic dsc=0x%lx)\n", 645 eni_vcc->descr,tmp); 646 DPRINTK("CB_DESCR %ld REG_DESCR %d\n",ENI_VCC(vcc)->descr, 647 (((unsigned) readl(vci_dsc+4) & MID_VCI_DESCR) >> 648 MID_VCI_DESCR_SHIFT)); 649 if (ENI_VCC(vcc)->rx(vcc)) return 1; 650 } 651 return 0; 652 } 653 654 655 static void poll_rx(struct atm_dev *dev) 656 { 657 struct eni_dev *eni_dev; 658 struct atm_vcc *curr; 659 660 eni_dev = ENI_DEV(dev); 661 while ((curr = eni_dev->fast)) { 662 EVENT("poll_rx.fast\n",0,0); 663 if (rx_vcc(curr)) return; 664 eni_dev->fast = ENI_VCC(curr)->next; 665 ENI_VCC(curr)->next = ENI_VCC_NOS; 666 barrier(); 667 ENI_VCC(curr)->servicing--; 668 } 669 while ((curr = eni_dev->slow)) { 670 EVENT("poll_rx.slow\n",0,0); 671 if (rx_vcc(curr)) return; 672 eni_dev->slow = ENI_VCC(curr)->next; 673 ENI_VCC(curr)->next = ENI_VCC_NOS; 674 barrier(); 675 ENI_VCC(curr)->servicing--; 676 } 677 } 678 679 680 static void get_service(struct atm_dev *dev) 681 { 682 struct eni_dev *eni_dev; 683 struct atm_vcc *vcc; 684 unsigned long vci; 685 686 DPRINTK(">get_service\n"); 687 eni_dev = ENI_DEV(dev); 688 while (eni_in(MID_SERV_WRITE) != eni_dev->serv_read) { 689 vci = readl(eni_dev->service+eni_dev->serv_read*4); 690 eni_dev->serv_read = (eni_dev->serv_read+1) & (NR_SERVICE-1); 691 vcc = eni_dev->rx_map[vci & 1023]; 692 if (!vcc) { 693 printk(KERN_CRIT DEV_LABEL "(itf %d): VCI %ld not " 694 "found\n",dev->number,vci); 695 continue; /* nasty but we try to go on anyway */ 696 /* @@@ nope, doesn't work */ 697 } 698 EVENT("getting from service\n",0,0); 699 if (ENI_VCC(vcc)->next != ENI_VCC_NOS) { 700 EVENT("double service\n",0,0); 701 DPRINTK("Grr, servicing VCC %ld twice\n",vci); 702 continue; 703 } 704 do_gettimeofday(&ENI_VCC(vcc)->timestamp); 705 ENI_VCC(vcc)->next = NULL; 706 if (vcc->qos.rxtp.traffic_class == ATM_CBR) { 707 if (eni_dev->fast) 708 ENI_VCC(eni_dev->last_fast)->next = vcc; 709 else eni_dev->fast = vcc; 710 eni_dev->last_fast = vcc; 711 } 712 else { 713 if (eni_dev->slow) 714 ENI_VCC(eni_dev->last_slow)->next = vcc; 715 else eni_dev->slow = vcc; 716 eni_dev->last_slow = vcc; 717 } 718 putting++; 719 ENI_VCC(vcc)->servicing++; 720 } 721 } 722 723 724 static void dequeue_rx(struct atm_dev *dev) 725 { 726 struct eni_dev *eni_dev; 727 struct eni_vcc *eni_vcc; 728 struct atm_vcc *vcc; 729 struct sk_buff *skb; 730 void __iomem *vci_dsc; 731 int first; 732 733 eni_dev = ENI_DEV(dev); 734 first = 1; 735 while (1) { 736 skb = skb_dequeue(&eni_dev->rx_queue); 737 if (!skb) { 738 if (first) { 739 DPRINTK(DEV_LABEL "(itf %d): RX but not " 740 "rxing\n",dev->number); 741 EVENT("nothing to dequeue\n",0,0); 742 } 743 break; 744 } 745 EVENT("dequeued (size=%ld,pos=0x%lx)\n",ENI_PRV_SIZE(skb), 746 ENI_PRV_POS(skb)); 747 rx_dequeued++; 748 vcc = ATM_SKB(skb)->vcc; 749 eni_vcc = ENI_VCC(vcc); 750 first = 0; 751 vci_dsc = eni_dev->vci+vcc->vci*16; 752 if (!EEPMOK(eni_vcc->rx_pos,ENI_PRV_SIZE(skb), 753 (readl(vci_dsc+4) & MID_VCI_READ) >> MID_VCI_READ_SHIFT, 754 eni_vcc->words)) { 755 EVENT("requeuing\n",0,0); 756 skb_queue_head(&eni_dev->rx_queue,skb); 757 break; 758 } 759 eni_vcc->rxing--; 760 eni_vcc->rx_pos = ENI_PRV_POS(skb) & (eni_vcc->words-1); 761 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 762 PCI_DMA_TODEVICE); 763 if (!skb->len) dev_kfree_skb_irq(skb); 764 else { 765 EVENT("pushing (len=%ld)\n",skb->len,0); 766 if (vcc->qos.aal == ATM_AAL0) 767 *(unsigned long *) skb->data = 768 ntohl(*(unsigned long *) skb->data); 769 memset(skb->cb,0,sizeof(struct eni_skb_prv)); 770 vcc->push(vcc,skb); 771 pushed++; 772 } 773 atomic_inc(&vcc->stats->rx); 774 } 775 wake_up(&eni_dev->rx_wait); 776 } 777 778 779 static int open_rx_first(struct atm_vcc *vcc) 780 { 781 struct eni_dev *eni_dev; 782 struct eni_vcc *eni_vcc; 783 unsigned long size; 784 785 DPRINTK("open_rx_first\n"); 786 eni_dev = ENI_DEV(vcc->dev); 787 eni_vcc = ENI_VCC(vcc); 788 eni_vcc->rx = NULL; 789 if (vcc->qos.rxtp.traffic_class == ATM_NONE) return 0; 790 size = vcc->qos.rxtp.max_sdu*eni_dev->rx_mult/100; 791 if (size > MID_MAX_BUF_SIZE && vcc->qos.rxtp.max_sdu <= 792 MID_MAX_BUF_SIZE) 793 size = MID_MAX_BUF_SIZE; 794 eni_vcc->recv = eni_alloc_mem(eni_dev,&size); 795 DPRINTK("rx at 0x%lx\n",eni_vcc->recv); 796 eni_vcc->words = size >> 2; 797 if (!eni_vcc->recv) return -ENOBUFS; 798 eni_vcc->rx = vcc->qos.aal == ATM_AAL5 ? rx_aal5 : rx_aal0; 799 eni_vcc->descr = 0; 800 eni_vcc->rx_pos = 0; 801 eni_vcc->rxing = 0; 802 eni_vcc->servicing = 0; 803 eni_vcc->next = ENI_VCC_NOS; 804 return 0; 805 } 806 807 808 static int open_rx_second(struct atm_vcc *vcc) 809 { 810 void __iomem *here; 811 struct eni_dev *eni_dev; 812 struct eni_vcc *eni_vcc; 813 unsigned long size; 814 int order; 815 816 DPRINTK("open_rx_second\n"); 817 eni_dev = ENI_DEV(vcc->dev); 818 eni_vcc = ENI_VCC(vcc); 819 if (!eni_vcc->rx) return 0; 820 /* set up VCI descriptor */ 821 here = eni_dev->vci+vcc->vci*16; 822 DPRINTK("loc 0x%x\n",(unsigned) (eni_vcc->recv-eni_dev->ram)/4); 823 size = eni_vcc->words >> 8; 824 for (order = -1; size; order++) size >>= 1; 825 writel(0,here+4); /* descr, read = 0 */ 826 writel(0,here+8); /* write, state, count = 0 */ 827 if (eni_dev->rx_map[vcc->vci]) 828 printk(KERN_CRIT DEV_LABEL "(itf %d): BUG - VCI %d already " 829 "in use\n",vcc->dev->number,vcc->vci); 830 eni_dev->rx_map[vcc->vci] = vcc; /* now it counts */ 831 writel(((vcc->qos.aal != ATM_AAL5 ? MID_MODE_RAW : MID_MODE_AAL5) << 832 MID_VCI_MODE_SHIFT) | MID_VCI_PTI_MODE | 833 (((eni_vcc->recv-eni_dev->ram) >> (MID_LOC_SKIP+2)) << 834 MID_VCI_LOCATION_SHIFT) | (order << MID_VCI_SIZE_SHIFT),here); 835 return 0; 836 } 837 838 839 static void close_rx(struct atm_vcc *vcc) 840 { 841 DECLARE_WAITQUEUE(wait,current); 842 void __iomem *here; 843 struct eni_dev *eni_dev; 844 struct eni_vcc *eni_vcc; 845 846 eni_vcc = ENI_VCC(vcc); 847 if (!eni_vcc->rx) return; 848 eni_dev = ENI_DEV(vcc->dev); 849 if (vcc->vpi != ATM_VPI_UNSPEC && vcc->vci != ATM_VCI_UNSPEC) { 850 here = eni_dev->vci+vcc->vci*16; 851 /* block receiver */ 852 writel((readl(here) & ~MID_VCI_MODE) | (MID_MODE_TRASH << 853 MID_VCI_MODE_SHIFT),here); 854 /* wait for receiver to become idle */ 855 udelay(27); 856 /* discard pending cell */ 857 writel(readl(here) & ~MID_VCI_IN_SERVICE,here); 858 /* don't accept any new ones */ 859 eni_dev->rx_map[vcc->vci] = NULL; 860 /* wait for RX queue to drain */ 861 DPRINTK("eni_close: waiting for RX ...\n"); 862 EVENT("RX closing\n",0,0); 863 add_wait_queue(&eni_dev->rx_wait,&wait); 864 set_current_state(TASK_UNINTERRUPTIBLE); 865 barrier(); 866 for (;;) { 867 /* transition service->rx: rxing++, servicing-- */ 868 if (!eni_vcc->servicing) { 869 barrier(); 870 if (!eni_vcc->rxing) break; 871 } 872 EVENT("drain PDUs (rx %ld, serv %ld)\n",eni_vcc->rxing, 873 eni_vcc->servicing); 874 printk(KERN_INFO "%d+%d RX left\n",eni_vcc->servicing, 875 eni_vcc->rxing); 876 schedule(); 877 set_current_state(TASK_UNINTERRUPTIBLE); 878 } 879 for (;;) { 880 int at_end; 881 u32 tmp; 882 883 tasklet_disable(&eni_dev->task); 884 tmp = readl(eni_dev->vci+vcc->vci*16+4) & MID_VCI_READ; 885 at_end = eni_vcc->rx_pos == tmp >> MID_VCI_READ_SHIFT; 886 tasklet_enable(&eni_dev->task); 887 if (at_end) break; 888 EVENT("drain discard (host 0x%lx, nic 0x%lx)\n", 889 eni_vcc->rx_pos,tmp); 890 printk(KERN_INFO "draining RX: host 0x%lx, nic 0x%x\n", 891 eni_vcc->rx_pos,tmp); 892 schedule(); 893 set_current_state(TASK_UNINTERRUPTIBLE); 894 } 895 set_current_state(TASK_RUNNING); 896 remove_wait_queue(&eni_dev->rx_wait,&wait); 897 } 898 eni_free_mem(eni_dev,eni_vcc->recv,eni_vcc->words << 2); 899 eni_vcc->rx = NULL; 900 } 901 902 903 static int start_rx(struct atm_dev *dev) 904 { 905 struct eni_dev *eni_dev; 906 907 eni_dev = ENI_DEV(dev); 908 eni_dev->rx_map = (struct atm_vcc **) get_zeroed_page(GFP_KERNEL); 909 if (!eni_dev->rx_map) { 910 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 911 dev->number); 912 free_page((unsigned long) eni_dev->free_list); 913 return -ENOMEM; 914 } 915 memset(eni_dev->rx_map,0,PAGE_SIZE); 916 eni_dev->rx_mult = DEFAULT_RX_MULT; 917 eni_dev->fast = eni_dev->last_fast = NULL; 918 eni_dev->slow = eni_dev->last_slow = NULL; 919 init_waitqueue_head(&eni_dev->rx_wait); 920 skb_queue_head_init(&eni_dev->rx_queue); 921 eni_dev->serv_read = eni_in(MID_SERV_WRITE); 922 eni_out(0,MID_DMA_WR_RX); 923 return 0; 924 } 925 926 927 /*----------------------------------- TX ------------------------------------*/ 928 929 930 enum enq_res { enq_ok,enq_next,enq_jam }; 931 932 933 static inline void put_dma(int chan,u32 *dma,int *j,dma_addr_t paddr, 934 u32 size) 935 { 936 u32 init,words; 937 938 DPRINTK("put_dma: 0x%lx+0x%x\n",(unsigned long) paddr,size); 939 EVENT("put_dma: 0x%lx+0x%lx\n",(unsigned long) paddr,size); 940 #if 0 /* don't complain anymore */ 941 if (paddr & 3) 942 printk(KERN_ERR "put_dma: unaligned addr (0x%lx)\n",paddr); 943 if (size & 3) 944 printk(KERN_ERR "put_dma: unaligned size (0x%lx)\n",size); 945 #endif 946 if (paddr & 3) { 947 init = 4-(paddr & 3); 948 if (init > size || size < 7) init = size; 949 DPRINTK("put_dma: %lx DMA: %d/%d bytes\n", 950 (unsigned long) paddr,init,size); 951 dma[(*j)++] = MID_DT_BYTE | (init << MID_DMA_COUNT_SHIFT) | 952 (chan << MID_DMA_CHAN_SHIFT); 953 dma[(*j)++] = paddr; 954 paddr += init; 955 size -= init; 956 } 957 words = size >> 2; 958 size &= 3; 959 if (words && (paddr & 31)) { 960 init = 8-((paddr & 31) >> 2); 961 if (init > words) init = words; 962 DPRINTK("put_dma: %lx DMA: %d/%d words\n", 963 (unsigned long) paddr,init,words); 964 dma[(*j)++] = MID_DT_WORD | (init << MID_DMA_COUNT_SHIFT) | 965 (chan << MID_DMA_CHAN_SHIFT); 966 dma[(*j)++] = paddr; 967 paddr += init << 2; 968 words -= init; 969 } 970 #ifdef CONFIG_ATM_ENI_BURST_TX_16W /* may work with some PCI chipsets ... */ 971 if (words & ~15) { 972 DPRINTK("put_dma: %lx DMA: %d*16/%d words\n", 973 (unsigned long) paddr,words >> 4,words); 974 dma[(*j)++] = MID_DT_16W | ((words >> 4) << MID_DMA_COUNT_SHIFT) 975 | (chan << MID_DMA_CHAN_SHIFT); 976 dma[(*j)++] = paddr; 977 paddr += (words & ~15) << 2; 978 words &= 15; 979 } 980 #endif 981 #ifdef CONFIG_ATM_ENI_BURST_TX_8W /* recommended */ 982 if (words & ~7) { 983 DPRINTK("put_dma: %lx DMA: %d*8/%d words\n", 984 (unsigned long) paddr,words >> 3,words); 985 dma[(*j)++] = MID_DT_8W | ((words >> 3) << MID_DMA_COUNT_SHIFT) 986 | (chan << MID_DMA_CHAN_SHIFT); 987 dma[(*j)++] = paddr; 988 paddr += (words & ~7) << 2; 989 words &= 7; 990 } 991 #endif 992 #ifdef CONFIG_ATM_ENI_BURST_TX_4W /* probably useless if TX_8W or TX_16W */ 993 if (words & ~3) { 994 DPRINTK("put_dma: %lx DMA: %d*4/%d words\n", 995 (unsigned long) paddr,words >> 2,words); 996 dma[(*j)++] = MID_DT_4W | ((words >> 2) << MID_DMA_COUNT_SHIFT) 997 | (chan << MID_DMA_CHAN_SHIFT); 998 dma[(*j)++] = paddr; 999 paddr += (words & ~3) << 2; 1000 words &= 3; 1001 } 1002 #endif 1003 #ifdef CONFIG_ATM_ENI_BURST_TX_2W /* probably useless if TX_4W, TX_8W, ... */ 1004 if (words & ~1) { 1005 DPRINTK("put_dma: %lx DMA: %d*2/%d words\n", 1006 (unsigned long) paddr,words >> 1,words); 1007 dma[(*j)++] = MID_DT_2W | ((words >> 1) << MID_DMA_COUNT_SHIFT) 1008 | (chan << MID_DMA_CHAN_SHIFT); 1009 dma[(*j)++] = paddr; 1010 paddr += (words & ~1) << 2; 1011 words &= 1; 1012 } 1013 #endif 1014 if (words) { 1015 DPRINTK("put_dma: %lx DMA: %d words\n",(unsigned long) paddr, 1016 words); 1017 dma[(*j)++] = MID_DT_WORD | (words << MID_DMA_COUNT_SHIFT) | 1018 (chan << MID_DMA_CHAN_SHIFT); 1019 dma[(*j)++] = paddr; 1020 paddr += words << 2; 1021 } 1022 if (size) { 1023 DPRINTK("put_dma: %lx DMA: %d bytes\n",(unsigned long) paddr, 1024 size); 1025 dma[(*j)++] = MID_DT_BYTE | (size << MID_DMA_COUNT_SHIFT) | 1026 (chan << MID_DMA_CHAN_SHIFT); 1027 dma[(*j)++] = paddr; 1028 } 1029 } 1030 1031 1032 static enum enq_res do_tx(struct sk_buff *skb) 1033 { 1034 struct atm_vcc *vcc; 1035 struct eni_dev *eni_dev; 1036 struct eni_vcc *eni_vcc; 1037 struct eni_tx *tx; 1038 dma_addr_t paddr; 1039 u32 dma_rd,dma_wr; 1040 u32 size; /* in words */ 1041 int aal5,dma_size,i,j; 1042 1043 DPRINTK(">do_tx\n"); 1044 NULLCHECK(skb); 1045 EVENT("do_tx: skb=0x%lx, %ld bytes\n",(unsigned long) skb,skb->len); 1046 vcc = ATM_SKB(skb)->vcc; 1047 NULLCHECK(vcc); 1048 eni_dev = ENI_DEV(vcc->dev); 1049 NULLCHECK(eni_dev); 1050 eni_vcc = ENI_VCC(vcc); 1051 tx = eni_vcc->tx; 1052 NULLCHECK(tx); 1053 #if 0 /* Enable this for testing with the "align" program */ 1054 { 1055 unsigned int hack = *((char *) skb->data)-'0'; 1056 1057 if (hack < 8) { 1058 skb->data += hack; 1059 skb->len -= hack; 1060 } 1061 } 1062 #endif 1063 #if 0 /* should work now */ 1064 if ((unsigned long) skb->data & 3) 1065 printk(KERN_ERR DEV_LABEL "(itf %d): VCI %d has mis-aligned " 1066 "TX data\n",vcc->dev->number,vcc->vci); 1067 #endif 1068 /* 1069 * Potential future IP speedup: make hard_header big enough to put 1070 * segmentation descriptor directly into PDU. Saves: 4 slave writes, 1071 * 1 DMA xfer & 2 DMA'ed bytes (protocol layering is for wimps :-) 1072 */ 1073 1074 aal5 = vcc->qos.aal == ATM_AAL5; 1075 /* check space in buffer */ 1076 if (!aal5) 1077 size = (ATM_CELL_PAYLOAD >> 2)+TX_DESCR_SIZE; 1078 /* cell without HEC plus segmentation header (includes 1079 four-byte cell header) */ 1080 else { 1081 size = skb->len+4*AAL5_TRAILER+ATM_CELL_PAYLOAD-1; 1082 /* add AAL5 trailer */ 1083 size = ((size-(size % ATM_CELL_PAYLOAD)) >> 2)+TX_DESCR_SIZE; 1084 /* add segmentation header */ 1085 } 1086 /* 1087 * Can I move tx_pos by size bytes without getting closer than TX_GAP 1088 * to the read pointer ? TX_GAP means to leave some space for what 1089 * the manual calls "too close". 1090 */ 1091 if (!NEPMOK(tx->tx_pos,size+TX_GAP, 1092 eni_in(MID_TX_RDPTR(tx->index)),tx->words)) { 1093 DPRINTK(DEV_LABEL "(itf %d): TX full (size %d)\n", 1094 vcc->dev->number,size); 1095 return enq_next; 1096 } 1097 /* check DMA */ 1098 dma_wr = eni_in(MID_DMA_WR_TX); 1099 dma_rd = eni_in(MID_DMA_RD_TX); 1100 dma_size = 3; /* JK for descriptor and final fill, plus final size 1101 mis-alignment fix */ 1102 DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags); 1103 if (!skb_shinfo(skb)->nr_frags) dma_size += 5; 1104 else dma_size += 5*(skb_shinfo(skb)->nr_frags+1); 1105 if (dma_size > TX_DMA_BUF) { 1106 printk(KERN_CRIT DEV_LABEL "(itf %d): needs %d DMA entries " 1107 "(got only %d)\n",vcc->dev->number,dma_size,TX_DMA_BUF); 1108 } 1109 DPRINTK("dma_wr is %d, tx_pos is %ld\n",dma_wr,tx->tx_pos); 1110 if (dma_wr != dma_rd && ((dma_rd+NR_DMA_TX-dma_wr) & (NR_DMA_TX-1)) < 1111 dma_size) { 1112 printk(KERN_WARNING DEV_LABEL "(itf %d): TX DMA full\n", 1113 vcc->dev->number); 1114 return enq_jam; 1115 } 1116 paddr = pci_map_single(eni_dev->pci_dev,skb->data,skb->len, 1117 PCI_DMA_TODEVICE); 1118 ENI_PRV_PADDR(skb) = paddr; 1119 /* prepare DMA queue entries */ 1120 j = 0; 1121 eni_dev->dma[j++] = (((tx->tx_pos+TX_DESCR_SIZE) & (tx->words-1)) << 1122 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1123 MID_DT_JK; 1124 j++; 1125 if (!skb_shinfo(skb)->nr_frags) 1126 if (aal5) put_dma(tx->index,eni_dev->dma,&j,paddr,skb->len); 1127 else put_dma(tx->index,eni_dev->dma,&j,paddr+4,skb->len-4); 1128 else { 1129 DPRINTK("doing direct send\n"); /* @@@ well, this doesn't work anyway */ 1130 for (i = -1; i < skb_shinfo(skb)->nr_frags; i++) 1131 if (i == -1) 1132 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1133 skb->data, 1134 skb->len - skb->data_len); 1135 else 1136 put_dma(tx->index,eni_dev->dma,&j,(unsigned long) 1137 skb_shinfo(skb)->frags[i].page + skb_shinfo(skb)->frags[i].page_offset, 1138 skb_shinfo(skb)->frags[i].size); 1139 } 1140 if (skb->len & 3) 1141 put_dma(tx->index,eni_dev->dma,&j,zeroes,4-(skb->len & 3)); 1142 /* JK for AAL5 trailer - AAL0 doesn't need it, but who cares ... */ 1143 eni_dev->dma[j++] = (((tx->tx_pos+size) & (tx->words-1)) << 1144 MID_DMA_COUNT_SHIFT) | (tx->index << MID_DMA_CHAN_SHIFT) | 1145 MID_DMA_END | MID_DT_JK; 1146 j++; 1147 DPRINTK("DMA at end: %d\n",j); 1148 /* store frame */ 1149 writel((MID_SEG_TX_ID << MID_SEG_ID_SHIFT) | 1150 (aal5 ? MID_SEG_AAL5 : 0) | (tx->prescaler << MID_SEG_PR_SHIFT) | 1151 (tx->resolution << MID_SEG_RATE_SHIFT) | 1152 (size/(ATM_CELL_PAYLOAD/4)),tx->send+tx->tx_pos*4); 1153 /*printk("dsc = 0x%08lx\n",(unsigned long) readl(tx->send+tx->tx_pos*4));*/ 1154 writel((vcc->vci << MID_SEG_VCI_SHIFT) | 1155 (aal5 ? 0 : (skb->data[3] & 0xf)) | 1156 (ATM_SKB(skb)->atm_options & ATM_ATMOPT_CLP ? MID_SEG_CLP : 0), 1157 tx->send+((tx->tx_pos+1) & (tx->words-1))*4); 1158 DPRINTK("size: %d, len:%d\n",size,skb->len); 1159 if (aal5) 1160 writel(skb->len,tx->send+ 1161 ((tx->tx_pos+size-AAL5_TRAILER) & (tx->words-1))*4); 1162 j = j >> 1; 1163 for (i = 0; i < j; i++) { 1164 writel(eni_dev->dma[i*2],eni_dev->tx_dma+dma_wr*8); 1165 writel(eni_dev->dma[i*2+1],eni_dev->tx_dma+dma_wr*8+4); 1166 dma_wr = (dma_wr+1) & (NR_DMA_TX-1); 1167 } 1168 ENI_PRV_POS(skb) = tx->tx_pos; 1169 ENI_PRV_SIZE(skb) = size; 1170 ENI_VCC(vcc)->txing += size; 1171 tx->tx_pos = (tx->tx_pos+size) & (tx->words-1); 1172 DPRINTK("dma_wr set to %d, tx_pos is now %ld\n",dma_wr,tx->tx_pos); 1173 eni_out(dma_wr,MID_DMA_WR_TX); 1174 skb_queue_tail(&eni_dev->tx_queue,skb); 1175 queued++; 1176 return enq_ok; 1177 } 1178 1179 1180 static void poll_tx(struct atm_dev *dev) 1181 { 1182 struct eni_tx *tx; 1183 struct sk_buff *skb; 1184 enum enq_res res; 1185 int i; 1186 1187 DPRINTK(">poll_tx\n"); 1188 for (i = NR_CHAN-1; i >= 0; i--) { 1189 tx = &ENI_DEV(dev)->tx[i]; 1190 if (tx->send) 1191 while ((skb = skb_dequeue(&tx->backlog))) { 1192 res = do_tx(skb); 1193 if (res == enq_ok) continue; 1194 DPRINTK("re-queuing TX PDU\n"); 1195 skb_queue_head(&tx->backlog,skb); 1196 requeued++; 1197 if (res == enq_jam) return; 1198 break; 1199 } 1200 } 1201 } 1202 1203 1204 static void dequeue_tx(struct atm_dev *dev) 1205 { 1206 struct eni_dev *eni_dev; 1207 struct atm_vcc *vcc; 1208 struct sk_buff *skb; 1209 struct eni_tx *tx; 1210 1211 NULLCHECK(dev); 1212 eni_dev = ENI_DEV(dev); 1213 NULLCHECK(eni_dev); 1214 while ((skb = skb_dequeue(&eni_dev->tx_queue))) { 1215 vcc = ATM_SKB(skb)->vcc; 1216 NULLCHECK(vcc); 1217 tx = ENI_VCC(vcc)->tx; 1218 NULLCHECK(ENI_VCC(vcc)->tx); 1219 DPRINTK("dequeue_tx: next 0x%lx curr 0x%x\n",ENI_PRV_POS(skb), 1220 (unsigned) eni_in(MID_TX_DESCRSTART(tx->index))); 1221 if (ENI_VCC(vcc)->txing < tx->words && ENI_PRV_POS(skb) == 1222 eni_in(MID_TX_DESCRSTART(tx->index))) { 1223 skb_queue_head(&eni_dev->tx_queue,skb); 1224 break; 1225 } 1226 ENI_VCC(vcc)->txing -= ENI_PRV_SIZE(skb); 1227 pci_unmap_single(eni_dev->pci_dev,ENI_PRV_PADDR(skb),skb->len, 1228 PCI_DMA_TODEVICE); 1229 if (vcc->pop) vcc->pop(vcc,skb); 1230 else dev_kfree_skb_irq(skb); 1231 atomic_inc(&vcc->stats->tx); 1232 wake_up(&eni_dev->tx_wait); 1233 dma_complete++; 1234 } 1235 } 1236 1237 1238 static struct eni_tx *alloc_tx(struct eni_dev *eni_dev,int ubr) 1239 { 1240 int i; 1241 1242 for (i = !ubr; i < NR_CHAN; i++) 1243 if (!eni_dev->tx[i].send) return eni_dev->tx+i; 1244 return NULL; 1245 } 1246 1247 1248 static int comp_tx(struct eni_dev *eni_dev,int *pcr,int reserved,int *pre, 1249 int *res,int unlimited) 1250 { 1251 static const int pre_div[] = { 4,16,128,2048 }; 1252 /* 2^(((x+2)^2-(x+2))/2+1) */ 1253 1254 if (unlimited) *pre = *res = 0; 1255 else { 1256 if (*pcr > 0) { 1257 int div; 1258 1259 for (*pre = 0; *pre < 3; (*pre)++) 1260 if (TS_CLOCK/pre_div[*pre]/64 <= *pcr) break; 1261 div = pre_div[*pre]**pcr; 1262 DPRINTK("min div %d\n",div); 1263 *res = TS_CLOCK/div-1; 1264 } 1265 else { 1266 int div; 1267 1268 if (!*pcr) *pcr = eni_dev->tx_bw+reserved; 1269 for (*pre = 3; *pre >= 0; (*pre)--) 1270 if (TS_CLOCK/pre_div[*pre]/64 > -*pcr) break; 1271 if (*pre < 3) (*pre)++; /* else fail later */ 1272 div = pre_div[*pre]*-*pcr; 1273 DPRINTK("max div %d\n",div); 1274 *res = (TS_CLOCK+div-1)/div-1; 1275 } 1276 if (*res < 0) *res = 0; 1277 if (*res > MID_SEG_MAX_RATE) *res = MID_SEG_MAX_RATE; 1278 } 1279 *pcr = TS_CLOCK/pre_div[*pre]/(*res+1); 1280 DPRINTK("out pcr: %d (%d:%d)\n",*pcr,*pre,*res); 1281 return 0; 1282 } 1283 1284 1285 static int reserve_or_set_tx(struct atm_vcc *vcc,struct atm_trafprm *txtp, 1286 int set_rsv,int set_shp) 1287 { 1288 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1289 struct eni_vcc *eni_vcc = ENI_VCC(vcc); 1290 struct eni_tx *tx; 1291 unsigned long size; 1292 void __iomem *mem; 1293 int rate,ubr,unlimited,new_tx; 1294 int pre,res,order; 1295 int error; 1296 1297 rate = atm_pcr_goal(txtp); 1298 ubr = txtp->traffic_class == ATM_UBR; 1299 unlimited = ubr && (!rate || rate <= -ATM_OC3_PCR || 1300 rate >= ATM_OC3_PCR); 1301 if (!unlimited) { 1302 size = txtp->max_sdu*eni_dev->tx_mult/100; 1303 if (size > MID_MAX_BUF_SIZE && txtp->max_sdu <= 1304 MID_MAX_BUF_SIZE) 1305 size = MID_MAX_BUF_SIZE; 1306 } 1307 else { 1308 if (eni_dev->ubr) { 1309 eni_vcc->tx = eni_dev->ubr; 1310 txtp->pcr = ATM_OC3_PCR; 1311 return 0; 1312 } 1313 size = UBR_BUFFER; 1314 } 1315 new_tx = !eni_vcc->tx; 1316 mem = NULL; /* for gcc */ 1317 if (!new_tx) tx = eni_vcc->tx; 1318 else { 1319 mem = eni_alloc_mem(eni_dev,&size); 1320 if (!mem) return -ENOBUFS; 1321 tx = alloc_tx(eni_dev,unlimited); 1322 if (!tx) { 1323 eni_free_mem(eni_dev,mem,size); 1324 return -EBUSY; 1325 } 1326 DPRINTK("got chan %d\n",tx->index); 1327 tx->reserved = tx->shaping = 0; 1328 tx->send = mem; 1329 tx->words = size >> 2; 1330 skb_queue_head_init(&tx->backlog); 1331 for (order = 0; size > (1 << (order+10)); order++); 1332 eni_out((order << MID_SIZE_SHIFT) | 1333 ((tx->send-eni_dev->ram) >> (MID_LOC_SKIP+2)), 1334 MID_TX_PLACE(tx->index)); 1335 tx->tx_pos = eni_in(MID_TX_DESCRSTART(tx->index)) & 1336 MID_DESCR_START; 1337 } 1338 error = comp_tx(eni_dev,&rate,tx->reserved,&pre,&res,unlimited); 1339 if (!error && txtp->min_pcr > rate) error = -EINVAL; 1340 if (!error && txtp->max_pcr && txtp->max_pcr != ATM_MAX_PCR && 1341 txtp->max_pcr < rate) error = -EINVAL; 1342 if (!error && !ubr && rate > eni_dev->tx_bw+tx->reserved) 1343 error = -EINVAL; 1344 if (!error && set_rsv && !set_shp && rate < tx->shaping) 1345 error = -EINVAL; 1346 if (!error && !set_rsv && rate > tx->reserved && !ubr) 1347 error = -EINVAL; 1348 if (error) { 1349 if (new_tx) { 1350 tx->send = NULL; 1351 eni_free_mem(eni_dev,mem,size); 1352 } 1353 return error; 1354 } 1355 txtp->pcr = rate; 1356 if (set_rsv && !ubr) { 1357 eni_dev->tx_bw += tx->reserved; 1358 tx->reserved = rate; 1359 eni_dev->tx_bw -= rate; 1360 } 1361 if (set_shp || (unlimited && new_tx)) { 1362 if (unlimited && new_tx) eni_dev->ubr = tx; 1363 tx->prescaler = pre; 1364 tx->resolution = res; 1365 tx->shaping = rate; 1366 } 1367 if (set_shp) eni_vcc->tx = tx; 1368 DPRINTK("rsv %d shp %d\n",tx->reserved,tx->shaping); 1369 return 0; 1370 } 1371 1372 1373 static int open_tx_first(struct atm_vcc *vcc) 1374 { 1375 ENI_VCC(vcc)->tx = NULL; 1376 if (vcc->qos.txtp.traffic_class == ATM_NONE) return 0; 1377 ENI_VCC(vcc)->txing = 0; 1378 return reserve_or_set_tx(vcc,&vcc->qos.txtp,1,1); 1379 } 1380 1381 1382 static int open_tx_second(struct atm_vcc *vcc) 1383 { 1384 return 0; /* nothing to do */ 1385 } 1386 1387 1388 static void close_tx(struct atm_vcc *vcc) 1389 { 1390 DECLARE_WAITQUEUE(wait,current); 1391 struct eni_dev *eni_dev; 1392 struct eni_vcc *eni_vcc; 1393 1394 eni_vcc = ENI_VCC(vcc); 1395 if (!eni_vcc->tx) return; 1396 eni_dev = ENI_DEV(vcc->dev); 1397 /* wait for TX queue to drain */ 1398 DPRINTK("eni_close: waiting for TX ...\n"); 1399 add_wait_queue(&eni_dev->tx_wait,&wait); 1400 set_current_state(TASK_UNINTERRUPTIBLE); 1401 for (;;) { 1402 int txing; 1403 1404 tasklet_disable(&eni_dev->task); 1405 txing = skb_peek(&eni_vcc->tx->backlog) || eni_vcc->txing; 1406 tasklet_enable(&eni_dev->task); 1407 if (!txing) break; 1408 DPRINTK("%d TX left\n",eni_vcc->txing); 1409 schedule(); 1410 set_current_state(TASK_UNINTERRUPTIBLE); 1411 } 1412 set_current_state(TASK_RUNNING); 1413 remove_wait_queue(&eni_dev->tx_wait,&wait); 1414 if (eni_vcc->tx != eni_dev->ubr) { 1415 /* 1416 * Looping a few times in here is probably far cheaper than 1417 * keeping track of TX completions all the time, so let's poll 1418 * a bit ... 1419 */ 1420 while (eni_in(MID_TX_RDPTR(eni_vcc->tx->index)) != 1421 eni_in(MID_TX_DESCRSTART(eni_vcc->tx->index))) 1422 schedule(); 1423 eni_free_mem(eni_dev,eni_vcc->tx->send,eni_vcc->tx->words << 2); 1424 eni_vcc->tx->send = NULL; 1425 eni_dev->tx_bw += eni_vcc->tx->reserved; 1426 } 1427 eni_vcc->tx = NULL; 1428 } 1429 1430 1431 static int start_tx(struct atm_dev *dev) 1432 { 1433 struct eni_dev *eni_dev; 1434 int i; 1435 1436 eni_dev = ENI_DEV(dev); 1437 eni_dev->lost = 0; 1438 eni_dev->tx_bw = ATM_OC3_PCR; 1439 eni_dev->tx_mult = DEFAULT_TX_MULT; 1440 init_waitqueue_head(&eni_dev->tx_wait); 1441 eni_dev->ubr = NULL; 1442 skb_queue_head_init(&eni_dev->tx_queue); 1443 eni_out(0,MID_DMA_WR_TX); 1444 for (i = 0; i < NR_CHAN; i++) { 1445 eni_dev->tx[i].send = NULL; 1446 eni_dev->tx[i].index = i; 1447 } 1448 return 0; 1449 } 1450 1451 1452 /*--------------------------------- common ----------------------------------*/ 1453 1454 1455 #if 0 /* may become useful again when tuning things */ 1456 1457 static void foo(void) 1458 { 1459 printk(KERN_INFO 1460 "tx_complete=%d,dma_complete=%d,queued=%d,requeued=%d,sub=%d,\n" 1461 "backlogged=%d,rx_enqueued=%d,rx_dequeued=%d,putting=%d,pushed=%d\n", 1462 tx_complete,dma_complete,queued,requeued,submitted,backlogged, 1463 rx_enqueued,rx_dequeued,putting,pushed); 1464 if (eni_boards) printk(KERN_INFO "loss: %ld\n",ENI_DEV(eni_boards)->lost); 1465 } 1466 1467 #endif 1468 1469 1470 static void bug_int(struct atm_dev *dev,unsigned long reason) 1471 { 1472 struct eni_dev *eni_dev; 1473 1474 DPRINTK(">bug_int\n"); 1475 eni_dev = ENI_DEV(dev); 1476 if (reason & MID_DMA_ERR_ACK) 1477 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1478 "error\n",dev->number); 1479 if (reason & MID_TX_IDENT_MISM) 1480 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - ident " 1481 "mismatch\n",dev->number); 1482 if (reason & MID_TX_DMA_OVFL) 1483 printk(KERN_CRIT DEV_LABEL "(itf %d): driver error - DMA " 1484 "overflow\n",dev->number); 1485 EVENT("---dump ends here---\n",0,0); 1486 printk(KERN_NOTICE "---recent events---\n"); 1487 event_dump(); 1488 } 1489 1490 1491 static irqreturn_t eni_int(int irq,void *dev_id,struct pt_regs *regs) 1492 { 1493 struct atm_dev *dev; 1494 struct eni_dev *eni_dev; 1495 u32 reason; 1496 1497 DPRINTK(">eni_int\n"); 1498 dev = dev_id; 1499 eni_dev = ENI_DEV(dev); 1500 reason = eni_in(MID_ISA); 1501 DPRINTK(DEV_LABEL ": int 0x%lx\n",(unsigned long) reason); 1502 /* 1503 * Must handle these two right now, because reading ISA doesn't clear 1504 * them, so they re-occur and we never make it to the tasklet. Since 1505 * they're rare, we don't mind the occasional invocation of eni_tasklet 1506 * with eni_dev->events == 0. 1507 */ 1508 if (reason & MID_STAT_OVFL) { 1509 EVENT("stat overflow\n",0,0); 1510 eni_dev->lost += eni_in(MID_STAT) & MID_OVFL_TRASH; 1511 } 1512 if (reason & MID_SUNI_INT) { 1513 EVENT("SUNI int\n",0,0); 1514 dev->phy->interrupt(dev); 1515 #if 0 1516 foo(); 1517 #endif 1518 } 1519 spin_lock(&eni_dev->lock); 1520 eni_dev->events |= reason; 1521 spin_unlock(&eni_dev->lock); 1522 tasklet_schedule(&eni_dev->task); 1523 return IRQ_HANDLED; 1524 } 1525 1526 1527 static void eni_tasklet(unsigned long data) 1528 { 1529 struct atm_dev *dev = (struct atm_dev *) data; 1530 struct eni_dev *eni_dev = ENI_DEV(dev); 1531 unsigned long flags; 1532 u32 events; 1533 1534 DPRINTK("eni_tasklet (dev %p)\n",dev); 1535 spin_lock_irqsave(&eni_dev->lock,flags); 1536 events = xchg(&eni_dev->events,0); 1537 spin_unlock_irqrestore(&eni_dev->lock,flags); 1538 if (events & MID_RX_DMA_COMPLETE) { 1539 EVENT("INT: RX DMA complete, starting dequeue_rx\n",0,0); 1540 dequeue_rx(dev); 1541 EVENT("dequeue_rx done, starting poll_rx\n",0,0); 1542 poll_rx(dev); 1543 EVENT("poll_rx done\n",0,0); 1544 /* poll_tx ? */ 1545 } 1546 if (events & MID_SERVICE) { 1547 EVENT("INT: service, starting get_service\n",0,0); 1548 get_service(dev); 1549 EVENT("get_service done, starting poll_rx\n",0,0); 1550 poll_rx(dev); 1551 EVENT("poll_rx done\n",0,0); 1552 } 1553 if (events & MID_TX_DMA_COMPLETE) { 1554 EVENT("INT: TX DMA COMPLETE\n",0,0); 1555 dequeue_tx(dev); 1556 } 1557 if (events & MID_TX_COMPLETE) { 1558 EVENT("INT: TX COMPLETE\n",0,0); 1559 tx_complete++; 1560 wake_up(&eni_dev->tx_wait); 1561 /* poll_rx ? */ 1562 } 1563 if (events & (MID_DMA_ERR_ACK | MID_TX_IDENT_MISM | MID_TX_DMA_OVFL)) { 1564 EVENT("bug interrupt\n",0,0); 1565 bug_int(dev,events); 1566 } 1567 poll_tx(dev); 1568 } 1569 1570 1571 /*--------------------------------- entries ---------------------------------*/ 1572 1573 1574 static const char *media_name[] __devinitdata = { 1575 "MMF", "SMF", "MMF", "03?", /* 0- 3 */ 1576 "UTP", "05?", "06?", "07?", /* 4- 7 */ 1577 "TAXI","09?", "10?", "11?", /* 8-11 */ 1578 "12?", "13?", "14?", "15?", /* 12-15 */ 1579 "MMF", "SMF", "18?", "19?", /* 16-19 */ 1580 "UTP", "21?", "22?", "23?", /* 20-23 */ 1581 "24?", "25?", "26?", "27?", /* 24-27 */ 1582 "28?", "29?", "30?", "31?" /* 28-31 */ 1583 }; 1584 1585 1586 #define SET_SEPROM \ 1587 ({ if (!error && !pci_error) { \ 1588 pci_error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,tonga); \ 1589 udelay(10); /* 10 usecs */ \ 1590 } }) 1591 #define GET_SEPROM \ 1592 ({ if (!error && !pci_error) { \ 1593 pci_error = pci_read_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL,&tonga); \ 1594 udelay(10); /* 10 usecs */ \ 1595 } }) 1596 1597 1598 static int __devinit get_esi_asic(struct atm_dev *dev) 1599 { 1600 struct eni_dev *eni_dev; 1601 unsigned char tonga; 1602 int error,failed,pci_error; 1603 int address,i,j; 1604 1605 eni_dev = ENI_DEV(dev); 1606 error = pci_error = 0; 1607 tonga = SEPROM_MAGIC | SEPROM_DATA | SEPROM_CLK; 1608 SET_SEPROM; 1609 for (i = 0; i < ESI_LEN && !error && !pci_error; i++) { 1610 /* start operation */ 1611 tonga |= SEPROM_DATA; 1612 SET_SEPROM; 1613 tonga |= SEPROM_CLK; 1614 SET_SEPROM; 1615 tonga &= ~SEPROM_DATA; 1616 SET_SEPROM; 1617 tonga &= ~SEPROM_CLK; 1618 SET_SEPROM; 1619 /* send address */ 1620 address = ((i+SEPROM_ESI_BASE) << 1)+1; 1621 for (j = 7; j >= 0; j--) { 1622 tonga = (address >> j) & 1 ? tonga | SEPROM_DATA : 1623 tonga & ~SEPROM_DATA; 1624 SET_SEPROM; 1625 tonga |= SEPROM_CLK; 1626 SET_SEPROM; 1627 tonga &= ~SEPROM_CLK; 1628 SET_SEPROM; 1629 } 1630 /* get ack */ 1631 tonga |= SEPROM_DATA; 1632 SET_SEPROM; 1633 tonga |= SEPROM_CLK; 1634 SET_SEPROM; 1635 GET_SEPROM; 1636 failed = tonga & SEPROM_DATA; 1637 tonga &= ~SEPROM_CLK; 1638 SET_SEPROM; 1639 tonga |= SEPROM_DATA; 1640 SET_SEPROM; 1641 if (failed) error = -EIO; 1642 else { 1643 dev->esi[i] = 0; 1644 for (j = 7; j >= 0; j--) { 1645 dev->esi[i] <<= 1; 1646 tonga |= SEPROM_DATA; 1647 SET_SEPROM; 1648 tonga |= SEPROM_CLK; 1649 SET_SEPROM; 1650 GET_SEPROM; 1651 if (tonga & SEPROM_DATA) dev->esi[i] |= 1; 1652 tonga &= ~SEPROM_CLK; 1653 SET_SEPROM; 1654 tonga |= SEPROM_DATA; 1655 SET_SEPROM; 1656 } 1657 /* get ack */ 1658 tonga |= SEPROM_DATA; 1659 SET_SEPROM; 1660 tonga |= SEPROM_CLK; 1661 SET_SEPROM; 1662 GET_SEPROM; 1663 if (!(tonga & SEPROM_DATA)) error = -EIO; 1664 tonga &= ~SEPROM_CLK; 1665 SET_SEPROM; 1666 tonga |= SEPROM_DATA; 1667 SET_SEPROM; 1668 } 1669 /* stop operation */ 1670 tonga &= ~SEPROM_DATA; 1671 SET_SEPROM; 1672 tonga |= SEPROM_CLK; 1673 SET_SEPROM; 1674 tonga |= SEPROM_DATA; 1675 SET_SEPROM; 1676 } 1677 if (pci_error) { 1678 printk(KERN_ERR DEV_LABEL "(itf %d): error reading ESI " 1679 "(0x%02x)\n",dev->number,pci_error); 1680 error = -EIO; 1681 } 1682 return error; 1683 } 1684 1685 1686 #undef SET_SEPROM 1687 #undef GET_SEPROM 1688 1689 1690 static int __devinit get_esi_fpga(struct atm_dev *dev, void __iomem *base) 1691 { 1692 void __iomem *mac_base; 1693 int i; 1694 1695 mac_base = base+EPROM_SIZE-sizeof(struct midway_eprom); 1696 for (i = 0; i < ESI_LEN; i++) dev->esi[i] = readb(mac_base+(i^3)); 1697 return 0; 1698 } 1699 1700 1701 static int __devinit eni_do_init(struct atm_dev *dev) 1702 { 1703 struct midway_eprom __iomem *eprom; 1704 struct eni_dev *eni_dev; 1705 struct pci_dev *pci_dev; 1706 unsigned long real_base; 1707 void __iomem *base; 1708 unsigned char revision; 1709 int error,i,last; 1710 1711 DPRINTK(">eni_init\n"); 1712 dev->ci_range.vpi_bits = 0; 1713 dev->ci_range.vci_bits = NR_VCI_LD; 1714 dev->link_rate = ATM_OC3_PCR; 1715 eni_dev = ENI_DEV(dev); 1716 pci_dev = eni_dev->pci_dev; 1717 real_base = pci_resource_start(pci_dev, 0); 1718 eni_dev->irq = pci_dev->irq; 1719 error = pci_read_config_byte(pci_dev,PCI_REVISION_ID,&revision); 1720 if (error) { 1721 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%02x\n", 1722 dev->number,error); 1723 return -EINVAL; 1724 } 1725 if ((error = pci_write_config_word(pci_dev,PCI_COMMAND, 1726 PCI_COMMAND_MEMORY | 1727 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1728 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory " 1729 "(0x%02x)\n",dev->number,error); 1730 return -EIO; 1731 } 1732 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d,base=0x%lx,irq=%d,", 1733 dev->number,revision,real_base,eni_dev->irq); 1734 if (!(base = ioremap_nocache(real_base,MAP_MAX_SIZE))) { 1735 printk("\n"); 1736 printk(KERN_ERR DEV_LABEL "(itf %d): can't set up page " 1737 "mapping\n",dev->number); 1738 return error; 1739 } 1740 eni_dev->base_diff = real_base - (unsigned long) base; 1741 /* id may not be present in ASIC Tonga boards - check this @@@ */ 1742 if (!eni_dev->asic) { 1743 eprom = (base+EPROM_SIZE-sizeof(struct midway_eprom)); 1744 if (readl(&eprom->magic) != ENI155_MAGIC) { 1745 printk("\n"); 1746 printk(KERN_ERR KERN_ERR DEV_LABEL "(itf %d): bad " 1747 "magic - expected 0x%x, got 0x%x\n",dev->number, 1748 ENI155_MAGIC,(unsigned) readl(&eprom->magic)); 1749 return -EINVAL; 1750 } 1751 } 1752 eni_dev->phy = base+PHY_BASE; 1753 eni_dev->reg = base+REG_BASE; 1754 eni_dev->ram = base+RAM_BASE; 1755 last = MAP_MAX_SIZE-RAM_BASE; 1756 for (i = last-RAM_INCREMENT; i >= 0; i -= RAM_INCREMENT) { 1757 writel(0x55555555,eni_dev->ram+i); 1758 if (readl(eni_dev->ram+i) != 0x55555555) last = i; 1759 else { 1760 writel(0xAAAAAAAA,eni_dev->ram+i); 1761 if (readl(eni_dev->ram+i) != 0xAAAAAAAA) last = i; 1762 else writel(i,eni_dev->ram+i); 1763 } 1764 } 1765 for (i = 0; i < last; i += RAM_INCREMENT) 1766 if (readl(eni_dev->ram+i) != i) break; 1767 eni_dev->mem = i; 1768 memset_io(eni_dev->ram,0,eni_dev->mem); 1769 /* TODO: should shrink allocation now */ 1770 printk("mem=%dkB (",eni_dev->mem >> 10); 1771 /* TODO: check for non-SUNI, check for TAXI ? */ 1772 if (!(eni_in(MID_RES_ID_MCON) & 0x200) != !eni_dev->asic) { 1773 printk(")\n"); 1774 printk(KERN_ERR DEV_LABEL "(itf %d): ERROR - wrong id 0x%x\n", 1775 dev->number,(unsigned) eni_in(MID_RES_ID_MCON)); 1776 return -EINVAL; 1777 } 1778 error = eni_dev->asic ? get_esi_asic(dev) : get_esi_fpga(dev,base); 1779 if (error) return error; 1780 for (i = 0; i < ESI_LEN; i++) 1781 printk("%s%02X",i ? "-" : "",dev->esi[i]); 1782 printk(")\n"); 1783 printk(KERN_NOTICE DEV_LABEL "(itf %d): %s,%s\n",dev->number, 1784 eni_in(MID_RES_ID_MCON) & 0x200 ? "ASIC" : "FPGA", 1785 media_name[eni_in(MID_RES_ID_MCON) & DAUGTHER_ID]); 1786 return suni_init(dev); 1787 } 1788 1789 1790 static int __devinit eni_start(struct atm_dev *dev) 1791 { 1792 struct eni_dev *eni_dev; 1793 1794 void __iomem *buf; 1795 unsigned long buffer_mem; 1796 int error; 1797 1798 DPRINTK(">eni_start\n"); 1799 eni_dev = ENI_DEV(dev); 1800 if (request_irq(eni_dev->irq,&eni_int,IRQF_SHARED,DEV_LABEL,dev)) { 1801 printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n", 1802 dev->number,eni_dev->irq); 1803 error = -EAGAIN; 1804 goto out; 1805 } 1806 pci_set_master(eni_dev->pci_dev); 1807 if ((error = pci_write_config_word(eni_dev->pci_dev,PCI_COMMAND, 1808 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 1809 (eni_dev->asic ? PCI_COMMAND_PARITY | PCI_COMMAND_SERR : 0)))) { 1810 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable memory+" 1811 "master (0x%02x)\n",dev->number,error); 1812 goto free_irq; 1813 } 1814 if ((error = pci_write_config_byte(eni_dev->pci_dev,PCI_TONGA_CTRL, 1815 END_SWAP_DMA))) { 1816 printk(KERN_ERR DEV_LABEL "(itf %d): can't set endian swap " 1817 "(0x%02x)\n",dev->number,error); 1818 goto free_irq; 1819 } 1820 /* determine addresses of internal tables */ 1821 eni_dev->vci = eni_dev->ram; 1822 eni_dev->rx_dma = eni_dev->ram+NR_VCI*16; 1823 eni_dev->tx_dma = eni_dev->rx_dma+NR_DMA_RX*8; 1824 eni_dev->service = eni_dev->tx_dma+NR_DMA_TX*8; 1825 buf = eni_dev->service+NR_SERVICE*4; 1826 DPRINTK("vci 0x%lx,rx 0x%lx, tx 0x%lx,srv 0x%lx,buf 0x%lx\n", 1827 eni_dev->vci,eni_dev->rx_dma,eni_dev->tx_dma, 1828 eni_dev->service,buf); 1829 spin_lock_init(&eni_dev->lock); 1830 tasklet_init(&eni_dev->task,eni_tasklet,(unsigned long) dev); 1831 eni_dev->events = 0; 1832 /* initialize memory management */ 1833 buffer_mem = eni_dev->mem - (buf - eni_dev->ram); 1834 eni_dev->free_list_size = buffer_mem/MID_MIN_BUF_SIZE/2; 1835 eni_dev->free_list = (struct eni_free *) kmalloc( 1836 sizeof(struct eni_free)*(eni_dev->free_list_size+1),GFP_KERNEL); 1837 if (!eni_dev->free_list) { 1838 printk(KERN_ERR DEV_LABEL "(itf %d): couldn't get free page\n", 1839 dev->number); 1840 error = -ENOMEM; 1841 goto free_irq; 1842 } 1843 eni_dev->free_len = 0; 1844 eni_put_free(eni_dev,buf,buffer_mem); 1845 memset_io(eni_dev->vci,0,16*NR_VCI); /* clear VCI table */ 1846 /* 1847 * byte_addr free (k) 1848 * 0x00000000 512 VCI table 1849 * 0x00004000 496 RX DMA 1850 * 0x00005000 492 TX DMA 1851 * 0x00006000 488 service list 1852 * 0x00007000 484 buffers 1853 * 0x00080000 0 end (512kB) 1854 */ 1855 eni_out(0xffffffff,MID_IE); 1856 error = start_tx(dev); 1857 if (error) goto free_list; 1858 error = start_rx(dev); 1859 if (error) goto free_list; 1860 error = dev->phy->start(dev); 1861 if (error) goto free_list; 1862 eni_out(eni_in(MID_MC_S) | (1 << MID_INT_SEL_SHIFT) | 1863 MID_TX_LOCK_MODE | MID_DMA_ENABLE | MID_TX_ENABLE | MID_RX_ENABLE, 1864 MID_MC_S); 1865 /* Tonga uses SBus INTReq1 */ 1866 (void) eni_in(MID_ISA); /* clear Midway interrupts */ 1867 return 0; 1868 1869 free_list: 1870 kfree(eni_dev->free_list); 1871 1872 free_irq: 1873 free_irq(eni_dev->irq, eni_dev); 1874 1875 out: 1876 return error; 1877 } 1878 1879 1880 static void eni_close(struct atm_vcc *vcc) 1881 { 1882 DPRINTK(">eni_close\n"); 1883 if (!ENI_VCC(vcc)) return; 1884 clear_bit(ATM_VF_READY,&vcc->flags); 1885 close_rx(vcc); 1886 close_tx(vcc); 1887 DPRINTK("eni_close: done waiting\n"); 1888 /* deallocate memory */ 1889 kfree(ENI_VCC(vcc)); 1890 vcc->dev_data = NULL; 1891 clear_bit(ATM_VF_ADDR,&vcc->flags); 1892 /*foo();*/ 1893 } 1894 1895 1896 static int eni_open(struct atm_vcc *vcc) 1897 { 1898 struct eni_dev *eni_dev; 1899 struct eni_vcc *eni_vcc; 1900 int error; 1901 short vpi = vcc->vpi; 1902 int vci = vcc->vci; 1903 1904 DPRINTK(">eni_open\n"); 1905 EVENT("eni_open\n",0,0); 1906 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) 1907 vcc->dev_data = NULL; 1908 eni_dev = ENI_DEV(vcc->dev); 1909 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC) 1910 set_bit(ATM_VF_ADDR,&vcc->flags); 1911 if (vcc->qos.aal != ATM_AAL0 && vcc->qos.aal != ATM_AAL5) 1912 return -EINVAL; 1913 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n",vcc->dev->number,vcc->vpi, 1914 vcc->vci); 1915 if (!test_bit(ATM_VF_PARTIAL,&vcc->flags)) { 1916 eni_vcc = kmalloc(sizeof(struct eni_vcc),GFP_KERNEL); 1917 if (!eni_vcc) return -ENOMEM; 1918 vcc->dev_data = eni_vcc; 1919 eni_vcc->tx = NULL; /* for eni_close after open_rx */ 1920 if ((error = open_rx_first(vcc))) { 1921 eni_close(vcc); 1922 return error; 1923 } 1924 if ((error = open_tx_first(vcc))) { 1925 eni_close(vcc); 1926 return error; 1927 } 1928 } 1929 if (vci == ATM_VPI_UNSPEC || vpi == ATM_VCI_UNSPEC) return 0; 1930 if ((error = open_rx_second(vcc))) { 1931 eni_close(vcc); 1932 return error; 1933 } 1934 if ((error = open_tx_second(vcc))) { 1935 eni_close(vcc); 1936 return error; 1937 } 1938 set_bit(ATM_VF_READY,&vcc->flags); 1939 /* should power down SUNI while !ref_count @@@ */ 1940 return 0; 1941 } 1942 1943 1944 static int eni_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flgs) 1945 { 1946 struct eni_dev *eni_dev = ENI_DEV(vcc->dev); 1947 struct eni_tx *tx = ENI_VCC(vcc)->tx; 1948 struct sk_buff *skb; 1949 int error,rate,rsv,shp; 1950 1951 if (qos->txtp.traffic_class == ATM_NONE) return 0; 1952 if (tx == eni_dev->ubr) return -EBADFD; 1953 rate = atm_pcr_goal(&qos->txtp); 1954 if (rate < 0) rate = -rate; 1955 rsv = shp = 0; 1956 if ((flgs & ATM_MF_DEC_RSV) && rate && rate < tx->reserved) rsv = 1; 1957 if ((flgs & ATM_MF_INC_RSV) && (!rate || rate > tx->reserved)) rsv = 1; 1958 if ((flgs & ATM_MF_DEC_SHP) && rate && rate < tx->shaping) shp = 1; 1959 if ((flgs & ATM_MF_INC_SHP) && (!rate || rate > tx->shaping)) shp = 1; 1960 if (!rsv && !shp) return 0; 1961 error = reserve_or_set_tx(vcc,&qos->txtp,rsv,shp); 1962 if (error) return error; 1963 if (shp && !(flgs & ATM_MF_IMMED)) return 0; 1964 /* 1965 * Walk through the send buffer and patch the rate information in all 1966 * segmentation buffer descriptors of this VCC. 1967 */ 1968 tasklet_disable(&eni_dev->task); 1969 skb_queue_walk(&eni_dev->tx_queue, skb) { 1970 void __iomem *dsc; 1971 1972 if (ATM_SKB(skb)->vcc != vcc) continue; 1973 dsc = tx->send+ENI_PRV_POS(skb)*4; 1974 writel((readl(dsc) & ~(MID_SEG_RATE | MID_SEG_PR)) | 1975 (tx->prescaler << MID_SEG_PR_SHIFT) | 1976 (tx->resolution << MID_SEG_RATE_SHIFT), dsc); 1977 } 1978 tasklet_enable(&eni_dev->task); 1979 return 0; 1980 } 1981 1982 1983 static int eni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg) 1984 { 1985 struct eni_dev *eni_dev = ENI_DEV(dev); 1986 1987 if (cmd == ENI_MEMDUMP) { 1988 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1989 printk(KERN_WARNING "Please use /proc/atm/" DEV_LABEL ":%d " 1990 "instead of obsolete ioctl ENI_MEMDUMP\n",dev->number); 1991 dump(dev); 1992 return 0; 1993 } 1994 if (cmd == ENI_SETMULT) { 1995 struct eni_multipliers mult; 1996 1997 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1998 if (copy_from_user(&mult, arg, 1999 sizeof(struct eni_multipliers))) 2000 return -EFAULT; 2001 if ((mult.tx && mult.tx <= 100) || (mult.rx &&mult.rx <= 100) || 2002 mult.tx > 65536 || mult.rx > 65536) 2003 return -EINVAL; 2004 if (mult.tx) eni_dev->tx_mult = mult.tx; 2005 if (mult.rx) eni_dev->rx_mult = mult.rx; 2006 return 0; 2007 } 2008 if (cmd == ATM_SETCIRANGE) { 2009 struct atm_cirange ci; 2010 2011 if (copy_from_user(&ci, arg,sizeof(struct atm_cirange))) 2012 return -EFAULT; 2013 if ((ci.vpi_bits == 0 || ci.vpi_bits == ATM_CI_MAX) && 2014 (ci.vci_bits == NR_VCI_LD || ci.vpi_bits == ATM_CI_MAX)) 2015 return 0; 2016 return -EINVAL; 2017 } 2018 if (!dev->phy->ioctl) return -ENOIOCTLCMD; 2019 return dev->phy->ioctl(dev,cmd,arg); 2020 } 2021 2022 2023 static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname, 2024 void __user *optval,int optlen) 2025 { 2026 return -EINVAL; 2027 } 2028 2029 2030 static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname, 2031 void __user *optval,int optlen) 2032 { 2033 return -EINVAL; 2034 } 2035 2036 2037 static int eni_send(struct atm_vcc *vcc,struct sk_buff *skb) 2038 { 2039 enum enq_res res; 2040 2041 DPRINTK(">eni_send\n"); 2042 if (!ENI_VCC(vcc)->tx) { 2043 if (vcc->pop) vcc->pop(vcc,skb); 2044 else dev_kfree_skb(skb); 2045 return -EINVAL; 2046 } 2047 if (!skb) { 2048 printk(KERN_CRIT "!skb in eni_send ?\n"); 2049 if (vcc->pop) vcc->pop(vcc,skb); 2050 return -EINVAL; 2051 } 2052 if (vcc->qos.aal == ATM_AAL0) { 2053 if (skb->len != ATM_CELL_SIZE-1) { 2054 if (vcc->pop) vcc->pop(vcc,skb); 2055 else dev_kfree_skb(skb); 2056 return -EINVAL; 2057 } 2058 *(u32 *) skb->data = htonl(*(u32 *) skb->data); 2059 } 2060 submitted++; 2061 ATM_SKB(skb)->vcc = vcc; 2062 tasklet_disable(&ENI_DEV(vcc->dev)->task); 2063 res = do_tx(skb); 2064 tasklet_enable(&ENI_DEV(vcc->dev)->task); 2065 if (res == enq_ok) return 0; 2066 skb_queue_tail(&ENI_VCC(vcc)->tx->backlog,skb); 2067 backlogged++; 2068 tasklet_schedule(&ENI_DEV(vcc->dev)->task); 2069 return 0; 2070 } 2071 2072 static void eni_phy_put(struct atm_dev *dev,unsigned char value, 2073 unsigned long addr) 2074 { 2075 writel(value,ENI_DEV(dev)->phy+addr*4); 2076 } 2077 2078 2079 2080 static unsigned char eni_phy_get(struct atm_dev *dev,unsigned long addr) 2081 { 2082 return readl(ENI_DEV(dev)->phy+addr*4); 2083 } 2084 2085 2086 static int eni_proc_read(struct atm_dev *dev,loff_t *pos,char *page) 2087 { 2088 struct hlist_node *node; 2089 struct sock *s; 2090 static const char *signal[] = { "LOST","unknown","okay" }; 2091 struct eni_dev *eni_dev = ENI_DEV(dev); 2092 struct atm_vcc *vcc; 2093 int left,i; 2094 2095 left = *pos; 2096 if (!left) 2097 return sprintf(page,DEV_LABEL "(itf %d) signal %s, %dkB, " 2098 "%d cps remaining\n",dev->number,signal[(int) dev->signal], 2099 eni_dev->mem >> 10,eni_dev->tx_bw); 2100 if (!--left) 2101 return sprintf(page,"%4sBursts: TX" 2102 #if !defined(CONFIG_ATM_ENI_BURST_TX_16W) && \ 2103 !defined(CONFIG_ATM_ENI_BURST_TX_8W) && \ 2104 !defined(CONFIG_ATM_ENI_BURST_TX_4W) && \ 2105 !defined(CONFIG_ATM_ENI_BURST_TX_2W) 2106 " none" 2107 #endif 2108 #ifdef CONFIG_ATM_ENI_BURST_TX_16W 2109 " 16W" 2110 #endif 2111 #ifdef CONFIG_ATM_ENI_BURST_TX_8W 2112 " 8W" 2113 #endif 2114 #ifdef CONFIG_ATM_ENI_BURST_TX_4W 2115 " 4W" 2116 #endif 2117 #ifdef CONFIG_ATM_ENI_BURST_TX_2W 2118 " 2W" 2119 #endif 2120 ", RX" 2121 #if !defined(CONFIG_ATM_ENI_BURST_RX_16W) && \ 2122 !defined(CONFIG_ATM_ENI_BURST_RX_8W) && \ 2123 !defined(CONFIG_ATM_ENI_BURST_RX_4W) && \ 2124 !defined(CONFIG_ATM_ENI_BURST_RX_2W) 2125 " none" 2126 #endif 2127 #ifdef CONFIG_ATM_ENI_BURST_RX_16W 2128 " 16W" 2129 #endif 2130 #ifdef CONFIG_ATM_ENI_BURST_RX_8W 2131 " 8W" 2132 #endif 2133 #ifdef CONFIG_ATM_ENI_BURST_RX_4W 2134 " 4W" 2135 #endif 2136 #ifdef CONFIG_ATM_ENI_BURST_RX_2W 2137 " 2W" 2138 #endif 2139 #ifndef CONFIG_ATM_ENI_TUNE_BURST 2140 " (default)" 2141 #endif 2142 "\n",""); 2143 if (!--left) 2144 return sprintf(page,"%4sBuffer multipliers: tx %d%%, rx %d%%\n", 2145 "",eni_dev->tx_mult,eni_dev->rx_mult); 2146 for (i = 0; i < NR_CHAN; i++) { 2147 struct eni_tx *tx = eni_dev->tx+i; 2148 2149 if (!tx->send) continue; 2150 if (!--left) { 2151 return sprintf(page,"tx[%d]: 0x%ld-0x%ld " 2152 "(%6ld bytes), rsv %d cps, shp %d cps%s\n",i, 2153 (unsigned long) (tx->send - eni_dev->ram), 2154 tx->send-eni_dev->ram+tx->words*4-1,tx->words*4, 2155 tx->reserved,tx->shaping, 2156 tx == eni_dev->ubr ? " (UBR)" : ""); 2157 } 2158 if (--left) continue; 2159 return sprintf(page,"%10sbacklog %u packets\n","", 2160 skb_queue_len(&tx->backlog)); 2161 } 2162 read_lock(&vcc_sklist_lock); 2163 for(i = 0; i < VCC_HTABLE_SIZE; ++i) { 2164 struct hlist_head *head = &vcc_hash[i]; 2165 2166 sk_for_each(s, node, head) { 2167 struct eni_vcc *eni_vcc; 2168 int length; 2169 2170 vcc = atm_sk(s); 2171 if (vcc->dev != dev) 2172 continue; 2173 eni_vcc = ENI_VCC(vcc); 2174 if (--left) continue; 2175 length = sprintf(page,"vcc %4d: ",vcc->vci); 2176 if (eni_vcc->rx) { 2177 length += sprintf(page+length,"0x%ld-0x%ld " 2178 "(%6ld bytes)", 2179 (unsigned long) (eni_vcc->recv - eni_dev->ram), 2180 eni_vcc->recv-eni_dev->ram+eni_vcc->words*4-1, 2181 eni_vcc->words*4); 2182 if (eni_vcc->tx) length += sprintf(page+length,", "); 2183 } 2184 if (eni_vcc->tx) 2185 length += sprintf(page+length,"tx[%d], txing %d bytes", 2186 eni_vcc->tx->index,eni_vcc->txing); 2187 page[length] = '\n'; 2188 read_unlock(&vcc_sklist_lock); 2189 return length+1; 2190 } 2191 } 2192 read_unlock(&vcc_sklist_lock); 2193 for (i = 0; i < eni_dev->free_len; i++) { 2194 struct eni_free *fe = eni_dev->free_list+i; 2195 unsigned long offset; 2196 2197 if (--left) continue; 2198 offset = (unsigned long) eni_dev->ram+eni_dev->base_diff; 2199 return sprintf(page,"free %p-%p (%6d bytes)\n", 2200 fe->start-offset,fe->start-offset+(1 << fe->order)-1, 2201 1 << fe->order); 2202 } 2203 return 0; 2204 } 2205 2206 2207 static const struct atmdev_ops ops = { 2208 .open = eni_open, 2209 .close = eni_close, 2210 .ioctl = eni_ioctl, 2211 .getsockopt = eni_getsockopt, 2212 .setsockopt = eni_setsockopt, 2213 .send = eni_send, 2214 .phy_put = eni_phy_put, 2215 .phy_get = eni_phy_get, 2216 .change_qos = eni_change_qos, 2217 .proc_read = eni_proc_read 2218 }; 2219 2220 2221 static int __devinit eni_init_one(struct pci_dev *pci_dev, 2222 const struct pci_device_id *ent) 2223 { 2224 struct atm_dev *dev; 2225 struct eni_dev *eni_dev; 2226 int error = -ENOMEM; 2227 2228 DPRINTK("eni_init_one\n"); 2229 2230 if (pci_enable_device(pci_dev)) { 2231 error = -EIO; 2232 goto out0; 2233 } 2234 2235 eni_dev = (struct eni_dev *) kmalloc(sizeof(struct eni_dev),GFP_KERNEL); 2236 if (!eni_dev) goto out0; 2237 if (!cpu_zeroes) { 2238 cpu_zeroes = pci_alloc_consistent(pci_dev,ENI_ZEROES_SIZE, 2239 &zeroes); 2240 if (!cpu_zeroes) goto out1; 2241 } 2242 dev = atm_dev_register(DEV_LABEL,&ops,-1,NULL); 2243 if (!dev) goto out2; 2244 pci_set_drvdata(pci_dev, dev); 2245 eni_dev->pci_dev = pci_dev; 2246 dev->dev_data = eni_dev; 2247 eni_dev->asic = ent->driver_data; 2248 error = eni_do_init(dev); 2249 if (error) goto out3; 2250 error = eni_start(dev); 2251 if (error) goto out3; 2252 eni_dev->more = eni_boards; 2253 eni_boards = dev; 2254 return 0; 2255 out3: 2256 atm_dev_deregister(dev); 2257 out2: 2258 pci_free_consistent(eni_dev->pci_dev,ENI_ZEROES_SIZE,cpu_zeroes,zeroes); 2259 cpu_zeroes = NULL; 2260 out1: 2261 kfree(eni_dev); 2262 out0: 2263 return error; 2264 } 2265 2266 2267 static struct pci_device_id eni_pci_tbl[] = { 2268 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_FPGA, PCI_ANY_ID, PCI_ANY_ID, 2269 0, 0, 0 /* FPGA */ }, 2270 { PCI_VENDOR_ID_EF, PCI_DEVICE_ID_EF_ATM_ASIC, PCI_ANY_ID, PCI_ANY_ID, 2271 0, 0, 1 /* ASIC */ }, 2272 { 0, } 2273 }; 2274 MODULE_DEVICE_TABLE(pci,eni_pci_tbl); 2275 2276 2277 static void __devexit eni_remove_one(struct pci_dev *pci_dev) 2278 { 2279 /* grrr */ 2280 } 2281 2282 2283 static struct pci_driver eni_driver = { 2284 .name = DEV_LABEL, 2285 .id_table = eni_pci_tbl, 2286 .probe = eni_init_one, 2287 .remove = __devexit_p(eni_remove_one), 2288 }; 2289 2290 2291 static int __init eni_init(void) 2292 { 2293 struct sk_buff *skb; /* dummy for sizeof */ 2294 2295 if (sizeof(skb->cb) < sizeof(struct eni_skb_prv)) { 2296 printk(KERN_ERR "eni_detect: skb->cb is too small (%Zd < %Zd)\n", 2297 sizeof(skb->cb),sizeof(struct eni_skb_prv)); 2298 return -EIO; 2299 } 2300 return pci_register_driver(&eni_driver); 2301 } 2302 2303 2304 module_init(eni_init); 2305 /* @@@ since exit routine not defined, this module can not be unloaded */ 2306 2307 MODULE_LICENSE("GPL"); 2308